Não informado. (1937). Bulletin of the Health Organisation. League of Nations.
Chicago-viite (17. p.)Não informado. Bulletin of the Health Organisation. Geneva, Suíça: League of Nations, 1937.
MLA-viite (8. p.)Não informado. Bulletin of the Health Organisation. League of Nations, 1937.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.